Retained Baby Teeth in Kittens: When to Extract

Kittens replace 26 baby teeth with 30 adult teeth between 3 and 6 months of age. The one problem worth acting on is a retained deciduous canine: the adult tooth pushes through and the baby tooth stays, leaving two teeth in one socket line. If the adult canine is fully erupted and the baby tooth is still firm 2 weeks later, it should come out, ideally between 4 and 6 months and ideally during the spay or neuter.

The 3 to 6 month switch

Baby teeth arrive fast: incisors at 3 to 4 weeks, canines at 3 to 5 weeks, premolars at 5 to 6 weeks, 26 in total and none of them molars. Adult teeth follow on a schedule that is tight enough to use as an age guide. Incisors change at 3 to 4 months, canines at 4 to 5 months, premolars at 4 to 6 months, and molars come in behind them without replacing anything. By 6 to 7 months a kitten should hold 30 permanent teeth. Because the order is predictable, vets use the mouth to estimate age, and the cat age chart turns each dental stage into a month. The canine is the one to watch, because it is long, curved, and the most likely to be left behind.

Age	What is happening	What to check
3 to 4 weeks	Baby incisors erupt	Nursing, no ulcers on the tongue
3 to 5 weeks	Baby canines erupt	Four small hooks, top and bottom
3 to 4 months	Adult incisors replace baby incisors	Two rows of small teeth at the front
4 to 5 months	Adult canines push through	Double canine on either side
4 to 6 months	Adult premolars erupt	Retained baby premolar beside a new one
6 to 7 months	Full adult set, 30 teeth	No extras, no crowding, pink gums

Checking the mouth in 30 seconds

Once a week from 3 months, sit the kitten on your lap facing away, lift the lip on each side with a finger, and look at the upper and lower canine on that side. You are looking for four canines total, not six or eight. The baby tooth sits slightly in front of and outside the adult one, is smaller, narrower, and often has a faint groove at the gum line. Take a photo each month on your phone so a change is obvious. Most kittens tolerate this if you finish with a treat and keep it under 30 seconds; a kitten that fights is easier to check after a meal when it is sleepy. A kitten that grabs your finger instead of holding still is teething, and the same mouth goes for sleeves and ankles; redirect it to a rubber toy using the rule in kitten play biting.

Baby tooth or adult tooth

Feature	Deciduous, baby	Permanent, adult
Size	About two-thirds the length	Long, thick at the base
Shape	Slender, strongly curved backward	Straighter, stouter
Color	Chalky white	Slightly ivory, glossier
Neck	Visible ridge where the gum meets it	Smooth transition
Feel	Loose to firm, often mobile	Solid in the bone

Why a double row matters

Two teeth in one spot change how the jaw closes. The lower canine gets pushed toward the tongue, and in some kittens the lower jaw grows narrower than the upper, so the canine lands against the roof of the mouth and can wear a hole in the palate. The second cost is plaque. The gap between the two teeth is a shelf that food packs into and a toothbrush cannot reach, so gingivitis starts by 8 to 10 months and calculus follows within a year. Retained teeth also raise the odds of root resorption, early loss of the adult tooth, and a permanent bad smell from the mouth. Flat-faced breeds such as Persians and British Shorthairs are over-represented, but any kitten can have it.

The 2-week rule and the right window

If the adult canine has broken through the gum and the baby tooth is still there after 14 days, book the extraction. Waiting for it to fall out on its own is only reasonable while the adult tooth is still under the gum, because at that point the baby tooth is doing no harm. The best window is 4 to 6 months, when the roots of the baby canine are resorbing and come out easily; many vets combine it with the spay or neuter at 5 to 6 months so the kitten has one anesthetic instead of two. Past 7 months the adult tooth has often already been pushed out of line, and the extraction fixes the crowding but not the bite.

What the appointment involves

General anesthesia, not a quick pull: a retained deciduous canine often has a long, thin root that fractures if twisted, and a broken root left behind causes infection and a draining tract. Ask for intraoral dental X-rays to see the root and the adult tooth's position. The extraction itself takes 10 to 20 minutes per tooth, sometimes with one suture. In the US, a standalone visit with anesthesia, X-rays, and one extraction runs 250 to 600 dollars; done alongside a spay it usually adds 40 to 90 dollars per tooth, with pre-anesthetic bloodwork at 60 to 140 dollars and X-rays at 75 to 150 dollars. In China, extraction is commonly 200 to 600 yuan per tooth plus 500 to 1500 yuan for anesthesia. Soft food for 3 to 5 days, no hard chew toys for 7 to 10 days, and a recheck at 10 to 14 days.

What not to do

Do not wiggle it out yourself, and never tie floss or thread around it: that pulls on the adult tooth, fractures roots, and can tear the gum. Do not assume the vet will remove it during the spay unless you ask in writing on the consent form, because it adds 10 to 15 minutes of surgical time. Do not skip the mouth check at the 4-month vaccine visit, which is the single appointment where most retained canines are found. And do not treat bad breath in a 6-month-old kitten as normal teething: at that age it usually means plaque between two teeth.

Five steps from here

1. Lift the lip weekly from 3 months and count four canines, no more.
2. Photograph the mouth monthly; bring the photos to the 4-month visit.
3. If an adult canine is out and the baby is firm at 14 days, book the extraction.
4. Schedule it with the spay or neuter at 5 to 6 months, and ask for dental X-rays.
5. After surgery, offer soft food for 3 to 5 days and low-entry litter, since a wobbly cat prefers a box it can walk into, as covered in litter box training.

Frequently asked